linux-kernel - Re: [linux-pm] Massive ext4 filesystem corruption after a failed s2disk/ram cycle

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Wed, 07 Oct 2009 13:14:10 +1100
From:	Daniel Pittman <daniel@...space.net>
To:	Henrique de Moraes Holschuh <hmh@....eng.br>
Cc:	"Rafael J. Wysocki" <rjw@...k.pl>,
	linux-pm@...ts.linux-foundation.org,
	Maxim Levitsky <maximlevitsky@...il.com>,
	linux-kernel <linux-kernel@...r.kernel.org>
Subject: Re: [linux-pm] Massive ext4 filesystem corruption after a failed s2disk/ram cycle

Henrique de Moraes Holschuh <hmh@....eng.br> writes:
> On Wed, 07 Oct 2009, Rafael J. Wysocki wrote:
>> On Wednesday 07 October 2009, Henrique de Moraes Holschuh wrote:
>> > On Tue, 06 Oct 2009, Rafael J. Wysocki wrote:
>> > > > You do sync file-systems before entering the hibernation, don't you?
>> > > 
>> > > Yes, a sync is there, but it is not effective on some filesystems.
>> > 
>> > Which ones?
>> 
>> XFS for one example.
>
> Interesting.  So XFS is not only a Bad Idea for /, but also for anything
> that might enter S3/S4.  Not nice.  I sure hope it doesn't do a
> half-assed job of flushing and checkpointing itself during machine
> shutdown/restart like it apparently does when told to "sync" before
> S3/S4...

For what it is worth, I would also be quite interested to know /why/ XFS is
bad in this regard.  Is it just the previously stated "XFS writes to disk
despite freezing kernel threads" issue, or something deeper?

        Daniel
-- 
✣ Daniel Pittman            ✉ daniel@...space.net            ☎ +61 401 155 707
               ♽ made with 100 percent post-consumer electrons
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/